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  • 1
    Electronic Resource
    Electronic Resource
    Time-related variation of non-protein sulfhydryl concentrations in rat tissues and human blood (1979)
    Springer
    International archives of occupational and environmental health 42 (1979), S. 141-148 
    Details
    ISSN: 1432-1246
    Keywords: Non-protein sulfhydryl concentration ; Liver ; Lung ; Kidney ; Blood ; Rat ; Human ; Glutathione
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The concentration of non-protein sulfhydryl compounds (NPSH) were measured at various times of the day in rat blood, liver, lung, and kidney as well as in human blood. In each of these cases, there was a significant (p 〈 0.05) 24 h concentration variation. The variation in rat liver non-protein sulfhydryl concentration, with a maximum around the noon-time period and a minimum around midnight, appeared to be related to food intake. Blood, lung, and kidney concentrations were not similarly related to food intake. No simple, linear correlation could be shown between tissue non-protein sulfhydryl concentration among the four rat tissues. Thus, rat blood NPSH does not predict rat tissue NPSH concentrations. In seven normal human volunteers, four males and three females, significant 24 h variations in blood NPSH concentrations were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377768
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  • 2
    Electronic Resource
    Electronic Resource
    1H-, 13C-, 19F-, 31P-NMR-Charakterisierung der Produkte der Alkoholyse von Trichlorophosphazen-N-Phosphoryldichlorid durch Trifluoroethanol (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 531 (1985), S. 188-198 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1H, 13C, 19F, 31P N.M.R. Characterization of the Alcoholysis Products of Trichlorophosphazene-N-phosphoryldichloride by TrifluoroethanolSince polychlorophosphazenes can be obtained by polycondensation of P2NOCl5 the classical substitution of Cl by CF3CH2O in these polymers was transposed to P2NOCl5. The formation of mono, di, or pentaester depends on the molar ratio of the reactants. By reaction of CF3CH2OH on the pentaester a tetrasubstituted derivative of tetrachlorodiphosphorylimid is obtained. All products are characterized by mass spectroscopy and 1H, 13C, 19F, and 31P n.m.r.
    Notes: Da P2NOCl5 als Ausgangsglied einer neuen Polychlorophosphazensynthese dient, wurde hier die übliche CF3CH2O Substitution der Cl-Atome im Polymer auf P2NOCl5 übertragen. Je nach dem Molverhältnis der Reagenzien erhält man den Mono-, Di- oder Pentaester. Bei der Reaktion von CF3CH2OH mit dem Pentaester entsteht ein tetrasubstituiertes Derivat des Tetrachlorodiphosphorylimids. Alle Produkte wurden durch massenspektrometrische Untersuchung und die 1H-, 13C-, 19F- und 31P-NMR-Spektren charakterisiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19855311226
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  • 3
    Electronic Resource
    Electronic Resource
    Beitrag zur Chemie der Phosphor-Stickstoff-Verbindungen. Reaktion von Cl2(O)P—NH—P(O)Cl2 mit Tetrahydrofuran (1983)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 501 (1983), S. 191-198 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contribution to the Chemistry of Phosphorus-Nitrogen Compounds. Reaction of Cl2(O)P—NH—P(O)Cl2 with TetrahydrofuranAs well as many phosphorus compounds, the imidodiphosphoryl tetrachloride HN(P(O)Cl2)2 reacts with a large excess of tetrahydrofuran to give the polytetrahydrofuran. Otherwise, if we use smaller molecular ratios THF/HN(P(O)Cl2)2 (1/2 to 3) a polytetrahydrofuran with short chains and N(ω-hydroxypolytetramethylenoxy)imidodiphosphoryl tetrachloride R—N(P(O)Cl2)2; R = H(O(CH2)4)n- are obtained at 22° or 30°C.The 1H and 31P n.m.r. spectra show that oxonium ions are formed with progressive additions of THF to HN(POCl2)2/CCl4 solution. Then two mechanisms have been considered by nucleophilic attack on carbon α of oxonium ion coming from: the free electronic dublett on oxygen of THF to give polytetrahydrofuran or (and) from the nitrogen of imido diphosphoryl tetra chloride anion ((Cl2OP)2N)- to obtain N(ω-hydroxypolytetramethylenoxy)imidodiphosphoryl tetrachloride.
    Notes: Wie im Falle vieler Phosphorverbindungen führt die Reaktion des Imidodiphosphoryltetrachlorids mit einem großen Überschuß Tetrahydrofuran zur Polymerisation des letzteren. Arbeitet man hingegen mit kleinen THF/HN(P(O)Cl2)2 Molverhältnissen (1/2 bis 3), so entsteht bei 22°C bzw. 30°C neben kurzen Poly-THF-Ketten N(ω-hydroxypolytetramethylenoxy)imidodiphosphoryltetrachlorid R—N(P(O)Cl2)2; R = H(O(CH2)4)n-. 1H- und 31P-NMR-Spektren bei stufenweiser Zugabe von THF zu einer HN(P(O)Cl2)2/CCl4-Lösung zeigen, daß sich ein Oxonium-Komplex bildet, der einen nukleophilen Angriff auf das in α-Stellung zum Sauerstoff stehende Kohlenstoffatom durch das Sauerstoffatom des THF oder durch das Stickstoffatom des (N(P(O)Cl2)2)--Anions bewirkt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19835010623
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  • 4
    Electronic Resource
    Electronic Resource
    Beitrag zur Chemie der Phosphor-Stickstoff-Verbindungen Reaktion von Cl3P=N—P(O)Cl2 mit Tetrahydrofuran (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 489 (1982), S. 204-210 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contribution to the Chemistry of Phosphorus Nitrogen Compounds. Reaction of Cl3P=N—P(O)Cl2 with TetrahydrofuranAs well as many phosphorus compounds, the trichlorophosphazene phosphoryldichloride Cl3P=N—P(O)Cl2 reacts at 30°C with a large excess of tetrahydrofuran to give the polytetrahydrofuran. Otherwise, if we use higher molecular ratios Cl3P=N—P(O)Cl2/THF (respectively 1/3 and 1) we obtain at 30°C beside polytetrahydrofuran the N chlorobutylimidodiphosphoryltetrachloride. This last compound is the main one obtained at 60°C and is probably formed by rearrangement of the O chlorobutyl isomer.However the formation of small quantities of polytetrahydrofuran chains linked with phosphorus cannot be avoided.
    Notes: Läßt man Trichlorophosphazenphosphoryldichlorid Cl3P=N—P(O)Cl2 bei 30°C mit Tetrahydrofuran in großem Überschuß reagieren, so beobachtet man, wie im Falle vieler Phosphorverbindungen, die Polymerisation des Tetrahydrofurans. Arbeitet man hingegen mit höheren Cl3P=N—P(O)Cl2/THF Molverhältnissen 1/3 bis 1, so bildet sich bei 30°C neben Polytetrahydrofuran N-Chlorobutylimidodiphosphoryltetrachlorid. Bei 60°C ist letzteres im Reaktionsgemisch überwiegend. Es bildet sich vermutlich durch Umlagerung des O-Chlorobutyl-Isomeren. Das Entstehen der am Phosphor gebundenen Polytetrahydrofuranketten kann jedoch nicht ganz vermieden werden.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824890124
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  • 5
    Electronic Resource
    Electronic Resource
    Ueber Pentosanbestimmungen (1903)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 36 (1903), S. 1222-1229 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.190303601251
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